This paper analyses exporting firms` labor productivity. We analyze empirical studies about difference from export and nonexport companies in term of productivity. This paper analyzes major determinants of export performance. Using regression techniques this paper investigates the performance of the external sector links to international markets relative to internal supply-side conditions. Results could indicate trade barriers importance on export performance. A strong and performing export sector is found in most countries accompany growing economy. Identifying the elements that significantly affect export performance should improve performance and overall economic growth. We need to analyze government policies that could also had the negative effects on the trade balance in trade liberalization country.